8558742478557 has 4 divisors (see below), whose sum is σ = 11411656638080. Its totient is φ = 5705828319036.

The previous prime is 8558742478513. The next prime is 8558742478651. The reversal of 8558742478557 is 7558742478558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8558742478557 - 2¹² = 8558742474461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8558742478357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1426457079757 + ... + 1426457079762.

It is an arithmetic number, because the mean of its divisors is an integer number (2852914159520).

Almost surely, 2^{8558742478557} is an apocalyptic number.

It is an amenable number.

8558742478557 is a deficient number, since it is larger than the sum of its proper divisors (2852914159523).

8558742478557 is a wasteful number, since it uses less digits than its factorization.

8558742478557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852914159522.

The product of its digits is 3512320000, while the sum is 75.

Subtracting from 8558742478557 its reverse (7558742478558), we obtain a palindrome (999999999999).

The spelling of 8558742478557 in words is "eight trillion, five hundred fifty-eight billion, seven hundred forty-two million, four hundred seventy-eight thousand, five hundred fifty-seven".